利用Cheng的電腦程式計算出Water\DMSO\EVAL系統的擴散路徑, 與SEM所觀察到的薄膜結構相比較, 可發現隨著相分離時間增加而手指型結構會變小且皮層厚度也將變薄。而增加沈澱槽中溶劑的濃度也將使得薄膜結構由原先的胞孔結構轉變成球型顆粒結構。由 DSC 的結果可發現無論是胞孔結構或是球型結構皆有相同大小的吸熱峰。 The diffusion paths of Water-DMSO-EVAL system were calculated and compared with the membrane structures observed by SEM. It was found that the macrovoids become smaller and the thickness of skin decreases, as the demixing time increases. Adding solvent into the precipitation bath causes an increase of the demixing time and the original cellular structure turns into the particulate structure. DSC thermograms of the membranes indicate a melting temperature and enthalpy of fusion similar to that of EVAL pellets.
關聯:
第二十屆高分子研討會論文專輯第十二卷第二冊=Proceedings of the 20th ROC Polymer Symposium 1997
